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Don't leak rd_statlist when a relcache entry is dropped.

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Although these lists are usually NIL, and even when not empty
are unlikely to be large, constant relcache update traffic could
eventually result in visible bloat of CacheMemoryContext.

Found via valgrind testing.
Back-patch to v10 where this field was added.

Discussion: https://postgr.es/m/3816764.1616104288@sss.pgh.pa.us
This commit is contained in:
Tom Lane 2021-03-18 20:37:09 -04:00
parent 5d825d7bee
commit 967b693eae
1 changed files with 1 additions and 0 deletions
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src/backend/utils/cache/relcache.c vendored
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@ -2268,6 +2268,7 @@ RelationDestroyRelation(Relation relation, bool remember_tupdesc)
FreeTriggerDesc(relation->trigdesc);
list_free_deep(relation->rd_fkeylist);
list_free(relation->rd_indexlist);
list_free(relation->rd_statlist);
bms_free(relation->rd_indexattr);
bms_free(relation->rd_projindexattr);
bms_free(relation->rd_keyattr);